Your suggestion to add "Load glx, dbe ...etc" to xorg.conf is because the nvidia driver is...I don't know how exactly to put this...a different or added component to xorg? I saw those items loaded in the log and hence i didn't put them into xorg.conf. Is my understanding correct?

I have actually remove some modes in the Display subsection (except for 1280x1024) thinking it would help. And I did put in the "UseEdid - False" option